Installation of a Gree Crossover Mini Split in Le Plateau-Mont-Royal, Montreal
A tale of an old AC, a surprise during installation, and the superior comfort of the Gree Crossover Mini Split. Join us on this HVAC journey!
In summer, the outdoor unit rejects the house's heat outside.
Generic illustration of this type of installation, not a survey of this job site. Tap a number.
Mounted level on a wall plate, high enough for the air to reach the whole room, with enough space around it to slide the filters out easily.
The refrigerant lines, the communication cable and the drain go through the wall in a single opening, sealed against water, cold air and insects.
Two insulated copper pipes connect the two units. Outside, a line cover can protect them from sun, knocks and weather.
A shut-off switch near the outdoor unit isolates it safely for service. It must stay accessible at all times.
The compressor and the fan. In heating mode it captures heat from the outdoor air, even in winter, and moves it inside.
On the ground or on the wall, it keeps the unit above accumulated snow. The unit stays clear and defrost water can drain away.
The fan needs to blow freely. Storage, a fence or a wall too close, and efficiency drops while noise goes up.
The Perfect Upgrade: From an Old Air Conditioner to a State-of-the-Art Heat Pump
The Backstory
Nestled in the heart of Le Plateau-Mont-Royal, Montreal, a homeowner faced a common dilemma. Their old 12,000 BTU air conditioner was no longer cutting it. The once reliable machine was now struggling to cool their space, and the noise it produced was far from ideal. They knew it was time for a change, and that's when they reached out to us at AirGreen.
Why the Gree Crossover Mini Split?
When the homeowner expressed their desire for a more powerful and quieter machine, we knew exactly what to recommend. The Gree Crossover Mini Split was the perfect fit for several reasons:
- Cooling Capacity: With a robust 18,000 BTU, it was a significant upgrade from their old unit.
- Silent Operation: With an interior sound pressure level of just 31/46 dB(A), it promised the peace they craved.
- Energy Efficiency: Boasting a 23.0 SEER rating and an Energy Star® certification, it was both eco-friendly and wallet-friendly.
- WiFi Connectivity: Modern problems require modern solutions. The included WiFi feature ensures the homeowner can control their comfort from anywhere.
- Extended Warranty: A 10-10-10 warranty on the compressor, parts, and labor, with an included extended warranty, speaks volumes about the product's reliability.
The Installation Journey
Upon arrival, our team was prepared for a straightforward replacement. However, every installation tells its own story. As we began the process, we decided to perform a leak test on the existing pipes. To our surprise, the old pipes were not up to par. They were leaking, and their quality was questionable at best.
But here at AirGreen, we believe in doing things right. We informed the homeowner of the situation and swiftly replaced the old pipes with high-quality ones that matched the 1/4 - 5/8 specification. This attention to detail not only ensured the efficiency of the new Gree Crossover but also safeguarded the homeowner's investment for years to come.
The Heat Pump Advantage
While the homeowner's initial unit was merely an air conditioner, we saw an opportunity to introduce them to the benefits of a heat pump. The Gree Crossover isn't just about cooling; it's also equipped to provide warmth even in temperatures as low as -30°C. And the cherry on top? The Provincial Grant of $570 that comes with this model. It's a win-win situation – superior comfort and savings!
A Happy Ending and a New Beginning
Our commitment to excellence didn't go unnoticed. The homeowner was thrilled with our meticulous approach and the quality of our work. Word of mouth is the best advertisement, and soon enough, their neighbor reached out to us. Another Gree Crossover was installed, and another customer was left delighted.
Key Features of the Gree Crossover Mini Split
- Dimensions:
- Interior: 38.63 x 8.75 x 12.25
- Exterior: 38 x 15.56 x 27.56
- Gas (Freon): R-410A ensures eco-friendly operation.
- Voltage: Operates on a standard 220V.
- Sound Levels:
- Exterior: 57.0 dB(A)
- Interior: 31/46 dB(A)
In Conclusion
At AirGreen, every installation is a journey, and we're committed to making it a memorable one for our customers. From the bustling streets of Montreal to the serene neighborhoods of Laval, Longueuil, North Shore, and South Shore, our mission remains the same – to deliver unparalleled HVAC solutions with a touch of personal care.
How it goes, from the first call to the end
The main steps of this kind of job at AirGreen. Every house has its quirks: the estimate brings them out.
We look at the room, the outside wall, the line route and where the outdoor unit will go. That is where the capacity gets chosen.
Model, capacity and price, in writing. We also check whether the model qualifies for assistance programs.
Floors and furniture protected, wall plate position marked level, wall opening located.
A single opening, with the slope the drain needs to flow outside.
Set on a stand raised above the snow, with the clearances the manufacturer requires.
Connected, insulated and protected. The opening is then sealed against water, cold air and insects.
A dedicated circuit and an accessible disconnect near the outdoor unit.
Leak test, vacuum, then start-up and a check of heating and cooling.
Remote, modes, filters: we show you the essentials before we leave.
- The on-site estimateWe look at the room, the outside wall, the line route and where the outdoor unit will go. That is where the capacity gets chosen.
- The quoteModel, capacity and price, in writing. We also check whether the model qualifies for assistance programs.
- Getting readyFloors and furniture protected, wall plate position marked level, wall opening located.
- The wall openingA single opening, with the slope the drain needs to flow outside.
- The outdoor unitSet on a stand raised above the snow, with the clearances the manufacturer requires.
- Lines, cable and drainConnected, insulated and protected. The opening is then sealed against water, cold air and insects.
- The electrical workA dedicated circuit and an accessible disconnect near the outdoor unit.
- Tests and start-upLeak test, vacuum, then start-up and a check of heating and cooling.
- The walkthroughRemote, modes, filters: we show you the essentials before we leave.
And at your place?
Two quick checks with real numbers: what heat costs, and what your current heaters add up to in BTU/h.
Conversion: 1 W = 3.412 BTU/h. An indication, not a load calculation: baseboards and furnaces are often stronger than the real need, and they can stay as backup. AirGreen confirms the capacity on site.
What to do, season by season
Three habits per season for this unit. They take a few minutes and prevent many calls.
- Clean the indoor unit's filters.
- Clear leaves and debris left on the outdoor unit by winter.
- Test cooling before the first hot days.
- Clean the filters more often when the unit runs a lot.
- Keep plants away from the outdoor unit.
- Check that no water drips from the indoor unit.
- Rake the leaves around the outdoor unit.
- Test heating before the first cold days.
- Book periodic maintenance before winter.
- Keep snow away from the stand and the front of the unit.
- Let the unit defrost: it is normal.
- Never hit the ice on the fins; call us if the unit stays iced up.
Which type of equipment for your project?
Pick what looks like your need.
Four mistakes we do not make
Flip each card to see what we do instead.
What people ask us about this kind of work
Does a wall-mounted heat pump heat in winter?
Wall-mounted or multi-zone: how do I choose?
Where does the outdoor unit go?
Are there grants?
Do I need a permit?
How cold can it heat?
How much can I save?
How is the LogisVert assistance calculated?
Is it noisy?
The outdoor unit is covered in ice: is that normal?
Does AirGreen hold the required licences?
Is the estimate free?
No question matches. Write to us: we answer.
Useful pages for what comes next
More jobs to see, near you
By town, by equipment or by region: browse more than 4,700 published projects.
Each dot: a town where AirGreen has published projects. The glowing dot: this job.
Tell us about your house. We come and see it for free.
The on-site estimate is free and the quote follows within 24 hours.
Text and photo: a real AirGreen Climatisation & Chauffage job. The diagrams are generic illustrations of the type of installation, not a survey of this job site. Sources of the added figures: airgreen.ca product pages (NEEP / AHRI performance), Hydro-Québec (Heat pumps page, LogisVert, read on 13 October 2026), Régie de l’énergie (rate D as of 1 April 2026).